Prochem Ninja master 500 PSI NMCU2250H, Operating Instructions Manual, Page: 15 / 46

15
Maintenance
Only qualified maintenance personnel are to
perform the following repairs.
Vacuum Motor Replacement
1. Turn off all switches and unplug machine.
2. Remove hardware under front of machine to
access component compartment.
3. Remove vacuum motor cover and disconnect
motor wires.
4. Remove the vacuum motor.
5. Reverse process to install vacuum motor.
86399110 - Operators Manual - Ninja Master 500PSI
Vacuum Motor Carbon Brushes Replacement
3
8
[9.5mm]
Carbon
Brushes
End Cap
WARNING: The
green ground wire
must be attached for
safe operation. See
wiring diagram.
If armature commutator is grooved, extremely pitted
or not concentric, the motor will need to be replaced
or sent to a qualified service center.
Important:
These brushes wear quicker as the length shortens
due to increased heat. Spring inside brush housing
will damage motor if brushes are allowed to wear
away completely.
Periodically check the length of the carbon brushes.
Replace both carbon brushes when either is less than
3/8" (9.5mm) long.